DriveFast7

iTrader: (1)

Looks very promising. Don't have to mess with the exhaust or install and
plumb an intercooler. Sure supercharger is parasitic but looks like an
effective way to add hp and torque without detrimental effects on MPG. I
think my REPU wants one!

What are the CONS of running a supercharger? Does anyone know if the Holley
Avenger comes pre-jetted for your application?

http://atkinsrotary.com/supercha.htm
Additional equipment needed: Carb, air filter, fuel pump

Email a request for the additional equipment pricing

7 inch Supercharger is now available for 13B engines 2395.00

Holley Carb

670 holley Avenger 399.95

Air Filter and Housing for the Holley carb set up

With a paper element $42.00

With a K&N element $150.00

Fuel Pump high Volume $95.00

All prices are for US Dollars and are subject to change without prior
notice. Prices do not include shipping and handling.


All numbers are subject to change depending on manifold, exhaust, ignition,
porting, etc. We used a 390cfm holley for carburetion.

Ported & Polished Four Port 13B with Seven Inch Supercharger
Horsepower: 275 HP
Torque: 184 lb-ft.
Boost: 10 lbs.

Ported & Polished Six Port 13B with Seven Inch Supercharger
Horsepower: 276 HP
Torque: 178 lb-ft.
Boost: 9 lbs.

Ported & Polished Four Port 12A with Seven Inch Supercharger
Horsepower: 233 HP
Torque: 150 lb-ft.
Boost: 12 lbs.

AdrenalifeRX7

Rotaries were made for turbocharging. Unless you are gonna be pulling crap and need more of a low end then get the S/C. The high revving, flat torque band nature of the rotary engine just screams turbo me. Higher HP and torque levels can ALWAYS be achieved through turbocharging. ALWAYS.

Jeff20B

iTrader: (13)

I think an SC kit on your REPU would be very cool. Better than all that complicated turbo stuff on such an old uncomplicated vehicle. You'll really like the results.

Note, Atkins recommends their Holley 390 carbs now. They come jetted for whichever SC you get (5 or 7 inch). Appearantly the 390 does well on a supercharger, probably because it's on an open plenum and therefore is not required to be so flippin large. Yeah, there's a reason RB's modded Holleys are as large as they are.

You have to trim the metal suspension cover a bit because the intake manifold sticks out pretty far. Other than that, it's pretty straight forward. Do it!

fatboy7

On a REPU, definately the SC isn't a bad idea. You can never have enough low end torque in a truck!! The atkins setup seems a bit steep, but there the only ones really offering a kit, so......

680RWHP12A

seems a bit pricey to me!
a turbo and a carburator(blow through) dosnt sound too complicated to me!!! and it would cost less too! and last longer, and, ok ill stop here..................

here is some food for thought......how long have turbo systems been around for rotary vehicles? at least since the early 70's... did they work good? yes, people are still using BAE turbo kits as well as the Cartech kits with great sucsess...
how long have superchargers been around? alot longer than turbos! how about kits for the Rotaries? one company, Camden, i believe they sold kits in the late 70's, how did they work? ok., not great..do you ANYBODY that is still using one? i dont!!!!! I know for a fact the Atkins S/C kits are the camden kits. suposidly they have fixed the problems the s/c kits used to have, but have you seen any fast rotaries with a Atkins s/c kit? i havent!
if you really want to go with a s/c talk to Sterling on the forum, he has a good s/c idea using a vortec s/c.. i think it will work really good! if you must go s/c!

RotaryMotorDisorter

I believe the atkins team has won many races with the supercharger. Turbo is better though.. hopfully ill go turbo before i die

DriveFast7

iTrader: (1)

Hi 680rwhp, can you supply longevity figures just for comparison sake? Ballpark $, HP and torque figure for your blow thru carb and turbo kit, and at what rpms?

Atkins says they have new bearings for their Camden superchargers.

Thanks,

680RWHP12A

what races?

680RWHP12A

well i havent been doing turbo kits since the 70's since thats when i was born but i have low budget customer cars that have used motors with used turbo's that have been running for over 4 years as daily drivers! i dont ask my customers for much, all i ask is that they put 91 octane gas, change the oil every 3k and dont overheat it! thats all it takes to be a happy turbo owner

CODE BLUE 2

I have a 79 that is supercharged.....and fast I might add...I haven't had any problems...I put the supercharger in about a year ago...and yes it was pricy....but I'm a happy supercharged person...

Metallic_rock

How easy was the install?

Gas mileage with the Supercharger?

Have you had any problems with the belts?

Are you using the stock setup?

Can you increase the boost?


Sorry, just a lot of questions for someone who has one.

DriveFast7

iTrader: (1)

Boost can be increased by changing the pulley size. Lots of boost is possible but motor must be up to the task. Low compression rotors, good cooling system, etc...

CODE BLUE 2

Ok....I'm only a girl....but can try to answer your questions regarding superchargers...Its a matter of preference actually....they both have their good and bad about them...I had Mazdas and More in Kent Wa..do my 79 changing it from a 13A to a ported out 13B with the supercharger....so no it isn't stock...on my 79. Last year it seems superchargers were only 5in...but have discovered they are now making 7in...which I will probably do next...

Yes boost can be increased with a few minor changes..as DriveFast7 has said.

One of the disadvantages of having a Supercharger is that the gas mileage is much worse than having a turbo...because the supercharger is always working...as the turbo is only when you use the accelerator...so to speak.

Super chargers advantages are that they are low end...and with turbo's it's that split sec that it takes for them to build up...as of superchargers it's pretty much instant.

I havent had any problems with belts or bearings from the camdon "atkins" supercharger yet....I did hear though that in the past there were problems...and have been fixed....

If you are interested in finding more out about what is needed for the change over...just let me know and I can try to let you know as much as I can ....

Oh....the 5in superchargers boost is usually 7lb and the 7in superchargers now are 11lb boost....

I am a superchargers fan....get back with me...

DriveFast7

iTrader: (1)

Yes, the more info the better. Which carb are you using? Atkins was using a big holley Avenger and now reccomends a 390 cfm? Is that a 2 bbl? Any info on that carb would help. How easy is it to tune?

How much has MPG decreased with the supercharger, and how much of that is attributable to a heavy right foot?

How does it do going up hills?

Any routing maintenance to the supercharger? How does it get lubed?

Thanks,

CODE BLUE 2

I have a Edelbrock 600 CFM Elec carb....but....if I want to change to the larger Supercharger I will need a different carb....so I can't tell you really which carb I would use on the 7in supercharger....I can find out for you tomorrow..Maybe a holley will be my next choice...

On the MPG difference...yeah a heavy right foot sure sucks the gas....but in general it still sucks gas....the car does not like to go slow what so ever...it's extreamly hard to go the speed limit...lol...I'm at the gas station about double than usual..but well worth the fun...

Going up hills....not a problem...it screams up a hill...in fact can't even tell Im going up a hill....doesn't faze it..the car whistles.....

I haven't had to do any maintenance on the Supercharger....as there are oil lines that go to the supercharger.....seems too easy...though I was told to always use the best gas "92 octaine"...and use 20/50 oil...only.

I have notice though since day one after having the supercharger installed that I do go through a lot of oil...so it's a good idea to check the oil at least every week.... Ive had to do a lot of changes to the car...for this supercharger to be installed....do you have instant messanger or...is there some way of just talking back and forth over this privately.....

I have pictures but do not know how to post them on here??????

12abridgeport

Ok that just made me want to get a supercharger really bad.

How come you say you will need a different carb for a bigger supercharger if you can just change the jets on yours, 600cfm is big enough i would think?

12abridgeport

double post

79+80+84_rx-7

well, can you take your car cleanly to 8K rpms with it on?

Does it make steady boost, or does it vary with rpms?

Do you have low compression rotors or high comp?

Do you have pics?

Well, if you would please hit me up on AIM its rotaryrx7toy ... I have more questions about it.......

DriveFast7

iTrader: (1)

Hi Code Blue,

oil lines go to the supercharger ? I plumb it into my engine's front oil hose? Or where? Did the Atkins kit come with oil lines and fittings?

Thanks,
REPU wanting Supercharging.....

CODE BLUE 2

Drivefast7...actually....Im not sure exactly how the oil mixes with this supercharger.....and where ....and how they work....but good question for me to ask when I take my car into the shop tomorrow....

I am having more stuff done to it....I'm pretty new at learning how these rotarys work....

I do know though I have had no problems with the supercharger....I know they had to modify a lot things on the car...such as the cooling system....low profile fan...and fabricating the oil metering system...re-routing a lot of wiring and fuel lines.....a bit of problems with the linkage on the throttle.... needed special pully kit.

They also removed the low-pressure fuel pump....and installed a high-performace fuel pump...at the same time I decided I needed a new exhaust system...so I put in a racingbeat exhaust....and a posi rear end.....on the test run my transmission went out..."of all luck" so I had to do a new tranny.....

I have the paper work on all the parts that were used....if you would like me to scan and send to you....so you can have a general idea on everything thats needed....

Im really glad that you guys ask these questions...as I'm making my list for my mechanic....to ask him...He told me he is scared to make my car faster.....but I'm ready..

As far as 8k when I was breaking in the engine...I was told not to go over 6k...for 6 months...after that I have managed to get it up to 7.5 with no problem...but I run out of room on the road...and yet havent had a chance to take it out on a track....

Im not sure if I have high compression or low...but will find out tomorrow....

As far as the variation on the boost.....thats what superchargers are all about....being steady.....everything is NOW....no hesitation...

I will instant message you 79 + 80 +84 rx-7

Rx7's are the best....

CODE BLUE 2

Ok....I don't know how to post pictures on here...I always have bad luck...so lets go this route...

http://photos.yahoo.com/bc/codeblue9...tos.yahoo.com/

Let me know what ya think...he he

Jeff20B

iTrader: (13)

Your car is really sharp looking.

Does Atkins do the mechanical work? Or is it someone else a little closer to federal way? I like what I see.

CODE BLUE 2

JEFF20B.....Ive had only one person work on my car....and that's mazda's and more....the number is (253)529-9665....and the 1-800 number is 1-800-700-9665...the owners name is KEN.....They have done everything under the hood of my car....including more...

Since going to them....they make things more on a personal basis....I have been to a few mazda dealers in the area....and mazdas and more....I know is the best....

They can be a bit spendy....but what shop isn't....they do extreamly awesome work....and do specialize....in rx-7's.....

If you are considering making that change....let ken know I refered you....my name is Deena

VaSSagO

Beautiful car, you wouldnt happen to have a dyno print out of her?? or had her dynoed?? Does the engine run that much warmer?? What fuel pump did you put on and what does it flow??

Rotor13B

I think i'm in love!!